How to measure the diameter of filaments with a laser pointer as a light source
A filament diameter measuring instrument with a laser pointer as a light source solves the problems of filament deformation, low precision, and heavy workload during measurement. Solution: Install the rotatable bracket and the fixed filament bracket on the fixed bracket in turn; the fixed filament bracket is equipped with a clip, which clamps the upper end of the filament, and the lower end is a plumb; install the Laser pointer at one end of the rotatable bracket in turn Rack (8), the rack (9) equipped with the reflector (12), and the rack (10) with the reflector (14) and the rack (11) equipped with the light screen or photoelectric receiver are installed in turn at the other end. ); The light beam generated by the laser pointer irradiates the filament to generate a coherent light beam, and enters the reflector (14) through the reflector (12) and then the diffraction fringes are reflected on the light screen to present a diffraction pattern, and the light screen is removed and installed with a photoelectric receiver. It has simple structure, low cost, clear diffraction stripes, and can conveniently and accurately analyze and measure filaments qualitatively and quantitatively. It can not only be used in classroom teaching for teachers, but also has certain scientific research value.
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At present, the measurement methods of filament diameter are still in a cumbersome stage, such as vernier caliper method, filament weighing method, etc., these measurement methods are still in the manual stage, on the one hand, the work intensity of the measurement is relatively large, on the other hand, the accuracy of the measurement is greater. not tall. At present, although there are also measurement methods that use the principle of diffraction to measure the diameter of the filament, the method of rotating the filament is often used to obtain the diffraction fringes on different sides of the filament. In this way, the twisting of the filament will give the observation and measurement of the diffraction fringe. Come error and other issues. Therefore, it is not conducive to a more comprehensive, convenient, accurate qualitative and quantitative analysis of the diameter of the filament, the detection of whether the cross-section of the filament is a perfect circle, and the thickness of the filament is uniform.
2021-10-12 11:29:35
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